Skid-chain.



J. A. MGDONALD.

SKID CHAIN.

APPLICATION FILED No.1, 191s.

1,091,437', Patented Mar. 24, 1914 y k /////l f /my/y 5'/ Uohn.McDonald.

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UNITED sfrATEs 'JOHN A. MDONALD, OF WINTHROP, MASSACHUSETTS. ASSIGNOR TOJULIUS R. PEC. OSF BROOKLINE, IVIASSACHUSETTS.

vs.mii-criant.

Specification of Letters Patent.

' Patented has for its object to provide a skid chain which isespecially adapted for use on motor trucks and the use of which does notentail anv appreciable wear On the tire.

Some embodiments ot' my invention will first be describednnd 'then thenovel features thereof will be pointed out in the appended claim.

Referring to the drawings wherein I have illustrated some selectedembodiments et my invention which disclose the principle thereof, Figure1 is a sectional view through i a rim showing my skid chain appliedthereto; Fig. 2 is a perspective viewof the attaching device; Fig. 3 isa View similar to Fig. l showing a different embodiment ot' theinvention; Fig. 4l is a diagrammatic view showing the operation of theskid chain; Fig. 5 is a section on the line :0-, Fig. 3. Fig. G is aperspective view-of a wear plate of different construction than thatshown in'Fi'g. 3;and Fig. `7 is a sec- -tion on the 'line 11k-y, Fig. 6.

One of the objects oi the invention is to provide a novel skid chainattachment. so constructed thatimder normal conditions the chain is'loosely resting against the tire and does not, therefore, subject thetirel to anywear, but when the vskid chain is` brought into use thestrain thereonfwill be transmittedl directly to the rim without subijecting the spokes to any stress.

In the drawings l indicates a wheel telly i having a tire 2 thereon.which tiro is here inl shown .asthe ordinary dual tread solid rubbertire. .l

3 designates the spokes of the wheel.`

My invention ycomprises a Askid-preventing memberwhich"may be in the"form of a chain or plate anda novel fastening for securing thisskid-preventing member to the wheel.

My iniprovcd fastening is' nest seen in spoke and is also provnr-d wFig. 2. `and it comprises a okee member 1i having twoarins 5S thatalo edto embrace a spoke 3 l having 0r exicnrf'ion (i. the end oi hieh pf ablyol et sliglnxv. as shown in Figs. a 2, and is provicfhnl with anonu-ning of: eve rl`his reke-shaped member S- .isprr' with a llat faireai'lapted o rest agai inside ot the rim. :is `vieni-lv showniin l Theother member H et i .fastening levi-ce a hook membra' whirl: prmidedlwith a eff head i) adapted toy enga one Side of the i ""ih two apertures l0 through which the e.. lot the :irma: 5 project. 'l`he 'tace ilol" this hook member S is llat and adapted to ,rest against the 7151inside ot" the rim and the top face 12 of the head Si also rests f theinside of the rim. "lhe hook member is provided With the hook portionii; which preferably has a spring keeper l cialed therewith. The arms 5are shown as oi'set slightly, as at 13, so that the imper tace of thevolze 'member l may stand in ihe'same plane'as the tare l? of the hookmember S.

ln 'llthe skid-preventing device is in the 't'orm of a chain it which isprovided with a hook li at one end to detachahlv cngage the eve T andwith one or more links LS at the other end adapted to engage 'the hook13. The construction is such as to permit of the chain being readil)vapplied to or removed trom the attaching device. lin applving thc chainto the attaching device the hook 17 is first introduced into the eye G.as showrrbv dotted lines Fig. 3 and then 9e the chain is placed up overthe tire and one oi" tin` links ,1S is hooked into the hook iii. Thechain is t sniiirientlength so that when it i5 apl'slir-d to the tire.as sini-.vu in liill. l, ii will iwrf1ii:r.\`ln2t;-- z' i ilnrniwiigsullirient .darkness to prf; lines li? to hook over iinhook :ir liedisvonirrcerl therefrom. vvivitli sin'h n. construction the chain 1Gwill 'simply lie ions-eli" on lh.A tire, as lshown iii/,Vig l. n:bindingv the ii..- later causing` ani4 wear to oec in fact. as Soon as'the wheel starts revoving the centrifugal for i will heid io throw thechain ont from contar-i with the sin-tare of the nhocl, `i`fhen thevilain strikes gronznl ihr wheel then rolls onto the chain. as shawn i:i. and the chain i i al lo he Wi eci troni iiii) f

